Sanding tool



Oct. 8, 1957 H. 5. BROWN ,6

' SANDING 'rooL Filed March 9, 1955 a Sheets-Sheet 1 ml i i l L x M HIM-h.

Fill

"HOWARD s. Bk'ow/v 1 /-//5 ATTORNEY Oct. 8, 1957 5, BROWN 2,808,687

SANDING TOOL Filed March 9, 1955 5 Sheets-Sheet 2 mvzwron. HOWARD 5. BROWN BY 1%uU W H/S A T TOENE Y 0d. 8, 1957 Q s, ow 2,808,687

SANDING Tool.

Filed March 9, 1955 3 Sheets-Sheet 3 F- I v I INVENTOR.

HOWARD 8. BROWN HIS A TTOENEY SANDING TOOL Howard S. Brown, Wabasso, Fla.

Application March 9, 1955, Serial No. 493,686

7 Claims. (Cl. 51-187) This invention relates to sanding devices and more particularly to a hand operable sanding block having a plurality of fiat surfaces over which abrasive material may be tautly stretched and secured thereon, resulting in a device wherein a particular size of abrasive material may be selectively utilized, depending upon the configuration of the work piece.

Heretofore, in devices of this class, one of the paramount disadvantages has been that means have not been provided where-by the operator is easily able to replenish the abrasive material when it has become worn. Usually the device has to be dismantled, and a new supply of abrasive material measured and cut to the required size, and then secured to the sanding device.

One advantage of the applicants invention over the devices of the prior art is that more than one surface is adaptable to be used as the sanding surface.

Another advantage is that a reserve supply of abrasive material of the correct size is carried within the confines of his device in such manner so as not to hamper the operator in using said device.

'Still another advantage of his device is that the abrasive material once worn may be removed and replaced very easily and with very little skill required.

Other advantages will be readily realized by use of said device, and a more thorough understanding will be realized by reference to the accompanying description of several embodiments thereof, which description is illustrated by the drawings herein, and which are included as a part of this specification.

In the drawings:

Fig. l is a top plan view shown partly in section of one embodiment of my invention;

Fig. 2 is an elevational view of the embodiment of l, with the keeper removed;

Fig. 3 is a fragmentary elevational view showing the position of the keeper and recess or pocket for the storage of the abrasive material;

Fig. 4 is a fragmentary elevational side view showing the keeper in its operative position with the abrasive material removed;

Fig. 5 is a side elevational view of the keeper;

Fig. 6 is mr elevational end view of the keeper;

Fig. 7 is a fragmentary elevational side view of a second embodiment of my invention;

Fig. 8 is a fragmentary sectional view taken on lines 8-3 of the embodiment of Fig. 7, with thekeeper and abrasive material removed;

Fig. 9 is a side elevational view partly in section of a third embodiment;

Fig. 10 is a sectional view taken on lines 1010 of the embodiment of Fig. 9, with the keeper and abrasive material removed;

Fig. 11 is a fragmentary elevational side view of a fourth embodiment;

Fig. 12 is a fragmentary sectional view taken on lines 12-12 of the embodiment of Fig. 11, with the keeper and abrasive material removed;

f nite States Patent Fig. 13 is a fragmentary side elevational view of a fifth embodiment;

Fig. 14 is a fragmentary view shown partly in section taken on lines 14-14 of the embodiment of Fig. 13, with the abrasive material removed;

Fig. 15 is a fragmentary side elevational view of a sixth embodiment;

Fig. 16 is a fragmentary view partly in section taken on lines 16-16 of the embodiment of Fig. 15, with the abrasive material removed; and

Fig. 17 is a side elevational view of an alternative construction of the embodiment of Fig. 9.

Referring now to the drawings throughout which like elements .are designated by like reference characters, the numeral 10, Fig. 1, denotes my sanding block in its entirety, which may be formed of any suitable material such as plastic, and although the drawings show my device constructed of a plastic material, the use is not to be considered a limitation thereof.

In the embodiment shown in Figs. l-6 my device comprises a central body 11 defined by walls 12 of elongated rectangular configuration, which are joined together at one end to form an apex 13, and which diverge outwardly from said apex in equal angular relation with respect to the bisector thereof. Adjacent the end of the body 11, opposite to said apex 13, the walls 12 are joined to walls 15 which converge sharply toward the horizontal axis of the body 11. At the junction point of said walls 12 and 15, a radial surface 16 is formed, thereby providing a smooth, continuous exterior surface 'for support of the abrasive material. A radial surface 17 may also be formed at the apex of said walls 12 for the same purpose.

The walls 15 converge toward the axis of said body, and round bosses 18, extending across the width of said walls, are formed integral with the free end of each wall, and are in a predetermined spaced relationship with each other, thereby providing a narrow channel or opening 19 therebetween.

A substantially circular pocket or recess 21 is formed centrally within the body 11 adjacent the radial surfaces 16, and the narrow channel 19 is connected thereto providing access to said pocket. The pocket or recess extends through the body 11, providing an opening 22 on one side thereof, and a plate 23 is secured to the body partially covering the opening at the opposite end of the recess. Said plate may also be formed integrally with the body 11. The purpose for said channel 22 and plate 23 used in conjunction with pocket 21 will be explained in detail hereinafter.

The walls 15 are formed of sufficient thickness to enable them to be flexible within a limited range, and the material may possess an inherent quality of stiffness so as to prevent the walls from buckling while being subjected to said flexure stress.

Cavities 25 are formed centrally within the body 11 adjacent to said recess and are arranged to provide adequate means by which the device may be grasped by the hand, and securely held, while manually manipulating said device during a sanding operation.

A roll of abrasive material 27, having substantially the same width as that of the walls 12 and 15, is placed within the pocket 21. One side of the roll abuts up against the plate 23 which prevents said roll from dropping out of that side of the pocket. The outside end 23 of the roll is grasped and pulled out through the channel 19. It is then stretched over one of the bosses '18, extended over the outside surfaces of one pair of walls 15 and 12, continued around apex 13, and over the opposite pair of walls 12 and 15 and opposite boss 18, and inserted back into and through the channel 19 and into the pocket 21. The position occupied by the abrasive roll in the pocket, and overlying portions thereof at the end of the above procedure is shown in Fig. 2.

A 'keeper'member'29,Fig. 5, of substantially rectangular configuration, having an elongated bar 31, and a lug member 32, extending vertically downward from one end of said bar 31, is then placed into the opening 19. The lower end'34 of the bar Fig. 6 is of wedge-shaped formation enabling the keeper to be partially inserted into the opening before pressure thereto need be applied.

'A narrow elongated groove '35 having a radial surface similar to that of each boss is formed; on 'each side of the bar 31, being diametrically opposite each other and directly above the wedge-shaped portion.

The keeper 29 is placed into the opening 19 in such manner that the wedge-shaped portion 34 extends across the width of the opening and the lug 32 is juxtaposed to the opening 22 and the roll'of abrasive material 27 within the recess 21.

In placing the keeper intooperative position, pressure is exerted upon the top surface 36 of the keeper forcing the'wedge-shapedportion between the bosses 18 and thereby tending to bend the walls 15 outward. The portion of the abrasive material extending over each boss 18 is engaged by the wedge-shaped portion of the keeper, and is carried over the surface of each boss, and forced toward and into the pocket 21. The abrasive material lying'over' the Walls 12 and 15 is thereby pulled taut to prevent said material from tearing or creasing during a sanding operation.

The pressure is exerted on the keeper member 29 until the grooves 35 are juxtaposed to the center of each boss whereby'the walls 15 will tend to spring back to their original position, and will force a part of each boss into the groove on each side of the bar 31; the result being that the keeper 'member is locked in place within the opening or channel 19, as shown in Fig. 3, tautly securing the abrasive material in operative position. The lug 32 extends downward and into proximity with the end of the roll adjacent the end opening 22, thereby preventing the' roll from sliding out of the pocket 21.

Several additional embodiments, having the same principle of operation, but of slightly different construction are shown in Figs. 7-16.

The embodiment of Fig. 7 has walls 37 that diverge outward from an apex (not shown) and provide two elongated surfaces for supporting abrasive materials. The

ends of said Walls, opposite to the apex, curve slightly is formed centrally within the body, providing a wide opening or channel 45 between the walls 37. Plates 46 formed integnally with the body of the device extends upwardly from each side of the central portion of the body, and partially incloses the sides of the recess or pocket 42.

The abrasive material 47 is placed within the pocket 42, and a continuous portion thereof is extended over the exterior surfaces of walls 37 in the same manner as brought forth hereinabove.

Parts of said continuous portion, upon entering and leaving said pocket, lie juxtaposed to the parallel sides 43 of the channel 45.

A keeper member 48, being substantially rectangular in cross-section is arranged to be placed .into the channel 45, and the sides 49 thereof are in pressure engagement with the parallel sides 43 of the channel and the abrasive material lying adjacent thereto. When pressure is applied to the keeper member 48 forcing it into the channel 45, sufficient friction is created between the sides 49 of the keeper and the abrasive material, to move said material over the sides 43 .of the channel toward the base 48 of the pocket 42, whereby the material lying overthe walls 37 is pulled taut, and thereby arranged inoperative position for subsequent use of said device. The. inner side 51 of the keeper member 48 may be formed with a concave surface thereby providing additional support for the roll" of abrasive "material.

The embodiment of Figs. 9 and 17 has a triangularshaped body 61 having abrasive supporting surfaces 62 and 63 opposite each other, and maintained in spaced relationship by side walls 64; said walls and supporting surfaces completely enclosing said body and defining a pocket or recess 65, having an opening 66 provided in one end of said body for placement of the abrasive material therein. Thepocket 65,;as-shown, extends throughout the interior of the .body, but it need only be of sufiicient depth to accommodate and store a roll of abrasive material adjacent the opening 66.

It may be desirable, for a particular use, to provide a sanding device having "a predetermined inherent weight, in addition to that disclosed herein, and it is contemplated that said weight could be inserted and secured within the pocket, or made an integral part of the device during its fabrication.

'One'of the abrasive supporting surfaces may also be comprised of a pliable material 67 such as sponge rubber whichmay be permanently affixed to wall 68 of the body 61. The operative position of said rubber material is shown in Fig. 17. This particular construction is exceedingly useful when work is to be performed on soft wood surfaces where it is possible for abrasive particles to be driven into the'wood merely by passing the sanding tool thereover.

.The supplyof abrasive material 69 is placed within the pocket 65, and one end thereof -is extended through the opening66, over surfaces 62 and 63, and then placed back intothe opening 66 of pocket 65.

A keeper member 71, in'the form of a thin plate which may be metallic or any other suitable material having resilientqualities, :is placed over the opening 66, with its ends 72 thereof residing in notches 73 formed on the inner faces of walls 62 and 68. The inner wall of each of the notches73 is parallel to the axis of the body, thereby providing an equal spaced relationship between said walls at the top and bottom of the notch. Said relationship enables :the keeper to engage the abrasive material with the same compressive force throughout the length of the notches. The ends 72 of the keeper may be bent in the 'form of loops to prevent tearing the abrasive material. The resilient qualities of the keeperpress the ends 72 thereof against the abrasive material, and force it against the shelf 74 formed on the inner end of each notch 73,.and'the portions of the abrasive material lying over the surfaces 62 and 63 are thereby pulled taut, and readiedfor use.

The sides 64 may be grasped by'the fingers with the palm ofthe handlying over'the surface 62 or 63, and securely held thereby while manually manipulating said sanding tool over the work piece.

' The embodiment of Fig. 11 shows a device having walls 81, extending from an apex (notshown) providing two elongated supporting surfaces. for abrasive material. The ends 82 of .saidwa'lls 81 are formed with round bosses 83 in a predetermined spaced relationship thereby forming an opening 84 therebetween. A recess or pocket 86 is formed centrally-within thebodyof the device having side walls 87 parallel .towalls 81, and a circular base 88. A supply of abrasive material is placed within said pocket, and the exteriorlayerthereof is extended through the opening 8.4,;overone. boss 83, exterior surfacesof walls 81, and'then placed over the opposite boss 83 and back into the pocket 86.

A keeper member 89, having inherent resilient propertiesis then placedacross the'opening 84. The ends of thekeeper 89 engage the abrasive material lying on the surface of each boss adjacent to the sides 87 of the pocket, and force .saidrmaterial .over said surfaces, and onto the side walls 87, and thereby pull said material over the surfacesof walls 81.

The side plates'9l, partially enclosing the pocket 86,

may be formed integrally with the body of the device, or attached to the outside edges of the pocket.

The keeper 89 and side plates 91 are operative to retain the supply of abrasive material within the pocket While using said device.

The embodiment of Fig. 13 shows a sanding device having a pair of side walls 94, which diverge outwardly in equal, angular-spaced relationship with respect to the horizontal axis of the device, meeting on one end to 01m an apex (not shown), and extending outward from said apex to join walls 96 at junction points 97. The walls 96 converge angularly toward the axis of the device from said junction points, and the free ends 92 terminate with a predetermined spaced-relationship forming an opening or channel 98 therebetween. The ends 92 of said walls may be rounded off to present smooth surfaces for the abrasive material.

A recess or pocket 101 is formed centrally within the body of the device, and is connected to the channel 98, providing a means for retaining and supplying abrasive material 102 to the exterior surfaces of said devices.

A keeper member 103, having a central rectangular portion 104, and a lug 105 formed on each end of said central portion, is slidable between the ends 92 of walls 96 and into the channel 98 wherein it is releasably secured by means of an elongated groove 109, formed on each side of the central portion 104, and which are engaged by the ends 92 or walls 96. The surfaces of said end portions and said grooves are complementary to each other thereby providing more efficient engagement therebetween.

The lower part 108 of the central portion 104 is wedgeshaped in form in the same manner as the lower end 34 of bar 31, of my first embodiment, shown in Fig. 5.

When the keeper member is in its operative position, the lugs 105 extend toward the pockets or recess 101 and lie adjacent to the ends thereof, and prevent the roll of abrasive material 102 from falling out of the pocket.

Preparatory to using the device, the roll of abrasive materail 102 is placed in the pocket 101, and one end thereof is extended outward through the opening or channel 98, over and around one end portion 92, over one wall 96, walls 94, opposite wall 96 and end portion 92, and then inserted back through the opening 98, and into the pocket 101.

The keeper member 103 is then placed into position over the opening 98 between the abrasive material lying over the surfaces 99 of end portions 92 of walls 96, and pressure is applied to the central part 104 of the keeper. The wedge-shaped part 108 enters into the opening 98, and forces the walls 96 slightly outward. The abrasive material lying over the surfaces 99 is engaged and forced toward the pocket or recess 101 whereby the abrasive material lying over the walls 94 and 96, is pulled taut to ready the device for use.

The groove 109 formed on each side of the central part 104 of the keeper above the wedge-shaped part 108 receives the surface 99 of each of said end portion 92 of wall 96 thereby securing the keeper within the channel or opening 98. The lugs 105 extend toward the pocket and into proximity with the ends of the roll of abrasive material and prevent said roll from sliding out of the pocket or recess.

The embodiment of Fig. 15 is comprised of a device generally triangular in form having Walls 112 diverging outwardly from an apex (not shown) in equal angularspaced relationship With respect to the horizontal axis of the device, and extending to a base wall 113. A radial surface 114 may be formed at each junction point of walls 112 and base 113 to provide a continuous smooth surface for support of the abrasive material 115.

A recess or pocket 116 is formed centrally within the device and an elongated channel 117 is placed centrally across the base 113, and connected to the recess 116 to 6 provide a means for storing and supplying abrasive material to the surfaces of said device.

Radial grooves 119 are formed diametrically opposite each other on each side 120 of the channel 117, and are arranged to receive and secure a keeper member 121 in the opening 117.

The keeper member is comprised of a round elongated bar 122, and a head 123 formed on one end thereof arranged to engage the body of the device adjacent to said grooves 119, and thereby prevent said keeper mem her from sliding completely through and out of the channel 117.

The roll of abrasive material 115 is placed into the pocket 116, and one end is extended through the channel 117, over the exterior surfaces of the base 113 and walls 112 and placed back through the channel and into the pocket 116.

The keeper member is placed into the grooves 119, between the abrasive material extending through the opening'or channel 117, whereby said material is forced into the grooves 119, and thereby pulling taut the abrasive material extending over the surfaces of the base 113 and walls 112.

Any one or all of the exterior surfaces of the devices illustrated may be provided with a layer of soft resilient material such as rubber, as described in connection with Fig. 9.

While I have disclosed several embodiments of my invention, it is understood that numerous departures may be made therefrom Without departing from the scope of my invention.

I claim:

1. A sanding tool comprising a body having a periphery for supporting an abrasive sheet, said body having a pocket therein and an opening leading from said pocket to the periphery of the body, a roll of abrasive sheet re ceived in said pocket and a segment of abrasive sheet extending from said roll out said opening at one side thereof and around the periphery of the body and back into said opening at the opposite side thereof, and a removable keeper engaging the abrasive sheet at said opening and clamping the abrasive sheet against the opposite sides of the opening.

2. A sanding tool comprising a body having a periphery which includes a pair of oppositely disposed major faces, said body having a pocket therein and an opening leading from said pocket to the periphery of the body, a roll of flexible abrasive sheet disposed in said pocket and a segment of said abrasive sheet connected to said roll and leading therefrom out one side of said opening and around the periphery of the body across said major faces and back into said opening at the opposite side thereof, and a manually removable keeper received in said opening between the portions of the abrasive sheet at the opposite sides of said opening and clamping said portions of the abrasive sheet snugly against the opposite sides of said opening.

3. The sanding tool of claim 2, wherein said body is wedge-shaped and said major faces form the opposite sides of the wedge.

4. The sanding tool of claim 3, wherein said body has a v wall at one end of said pocket for engaging the corresponding end of the abrasive roll to retain the roll in the pocket.

5. The sanding tool of claim 4, wherein said keeper is formed with a protrusion which engages an end of the abrasive roll to retain the roll in said pocket in the body.

6. The sanding tool of claim 2, wherein said keeper is in the form of a resilient plate having its opposite edges pressing against the abrasive sheet at opposite sides of said opening in the body.

7. The sanding tool of claim 3, wherein said bodyhas side walls at said opening which converge toward each other away from said pocket and which are flexed slightly by the insertion of the keeper into said opening, and

saidkeep'er has gm'oves for receivingihe ends of-'saidside walls.

References Gi't'edin the fil of this patent UNITED STATES PATENTS" Peters Jim; 29; 1907 Morris Jam. 19, 1926 Lewis Ian. 24', 1928 White Nov: 13; 1928 10, Quinn- Ian. 10, 1933 Wurfschmidt Feb. 13, 1934' 

